The lists on this page come from the Political Science research guide and are an excellent set of resources to help you find political statistics.
You can also find statistics within scholarly literature, so pay attention to any statistics you come across and track down where the researcher found them (or if the researcher generated the statistics through their own scholarship). Use the Political Science research guide for ideas on how to search the literature.
Please reach out to a librarian for help, too. We enjoy helping you identify and track down statistics. Remember that if you google "politics statistics" that you make sure you're evaluating the site so you know what you're looking at and where the data originated. Librarians can help you vet sites, too, and are happy to take a look at what you've found.
This list is fairly US-centered; for public opinion data from other regions of the world, visit the Researching Countries tab and consult the Statistics and Data - Worldwide and Statistics and Data - Regional boxes.
This work is licensed under CC BY-NC-SA 4.0